there's no way to "prove" han is fake.

on the other hand, there's also no way to "prove" han (or any writer) really wrote the things he claimed.

at best writers can provide as much evidence as possible, but doubts can never be absolutely erased, they may not be probable, but always possible.

han actually asked a good Q, how to "prove" some1 really wrote sth.

bottom line, it's not a court's duty or the right place to decide such issues, unless the two sides are fighting about which one is the real writer, only then should the court intervene and make a decision, based on who provide more evidences. although as i said, there's no way to absolutely be sure who's real, but the preponderance of logic and evidence usually is good enough to determine.

when such accusations happen, such as fang did to han, let public decide and readers make each own judgement. if the accusation lacks merit, the accused clears name and the accuser loses credibility. some might say it's unfair to the accused, but i guess that's just part of the price one pays to be a celebrity or public figure.